Header header
## 181 :Neighbor vehicle information
uint32   Timestamp   # The time stamp of the differential GPS #
float64   lat         # Latitude, expressed as degrees * 1E7   #
float64   lon        # Longitude, expressed as degrees * 1E7  # 
float64   alt         # Altitude in meters, expressed as * 1000 (milimetre), AMSL (not WGS84 - note that virtually all GPS modules provide the AMSL as well) #
float32    groundspeed # Expressed as m/s                       #
float32    cog         # Course over ground in degrees, expressed as degrees*100, 0.0..359.99 degrees #
uint8    ID          # The identity of the ground vehicle     #